Sort out some defined(PLD_extqt) code issues so that -DPLD_extqt=ON does not require -DPLD_qtwidget=ON to work properly.
Sort out some defined(PLD_extqt) code issues so that -DPLD_extqt=ON does not
require -DPLD_qtwidget=ON to work properly.


svn path=/trunk/; revision=9810

FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot